Industrial hygiene is the science of protecting the health and safety of people in the workplace. The term emerged in the early 1900s with the launch of the Industrial Hygiene arm of the American Public Health Association (APHA).

Industrial Hygiene (IH) is a science and art devoted to the anticipation, recognition, evaluation, control, and confirmation of protection from those environmental factors or stresses arising in or from the workplace which may cause sickness, impaired health and well being, or significant discomfort among workers or among citizens of the community.

Occupational hygiene (United States: industrial hygiene (IH)) is the anticipation, recognition, evaluation, control, and confirmation (ARECC) of protection from risks associated with exposures to hazards in, or arising from, the workplace that may result in injury, illness, impairment, or affect the well-being of workers and members of the community.

Industrial hygiene is the science of anticipating, recognizing, evaluating, and controlling workplace conditions that may cause workers' injury or illness.

Industrial hygiene is the anticipation, recognition, evaluation, and control of workplace environmental factors that may affect the health, comfort, or productivity of the worker. Industrial hygiene is considered a science, but it is also an art that involves judgment, creativity, and human interaction.